Means for controlling the draft in air-blast cotton gins



Sept. s, 1925. 1,552,719

VAN BUREN MADRY- MEANS FOR CONTROLLING THE DRAFT IN AIR BLAST COTTON GINS forming Patented Sept. 8, 1925.

UNITED STATES VAN BUREN MADRY, FORT COBB, OKLAHOMA.

MEANS FOR CONTROLLING THE DRAFT IN AIR-BLAST COTTON GINS.

Application filed April 15, 1925. Serial No. 23,338.

T 0 all whom it may concern:

Be it known that I, VAN BUREN MADRY, a citizen of the United States, residing at Fort Cobb, in the county of Caddo and State of Oklahoma, have invented a certain new and useful Improvement in Means for Controlling the Draft in Air-Blast Cotton Grins, of which the following is a specification, reference being had to the accompanying drawings. I

The object of the invention is to provide a device of the character described which will be cheap, comparatively light, strong, durable, easily installed and attached, economical in its manufacture and operation; also that will control the application and draft of the air in the moting chamber in air blast cotton gins, particularly of the type of the Murray gin, controlthe motes and dirt preventing them from being drawn in with the products of the cotton at the mote board, and directing their being carried out through the mote and dirt conveyor; controlling the lint and other products of the cotton so as to save them, and preventing them from being carried off through the mote and dirt conveyor; also preventing the gumming up of the mote board and shield by green or damp cotton, grasshoppers, spiders and such like, and preventing the lint and other products from sticking and clinging to the mote board and shield when So gummed up; and preventing back lashing and danger from fire; and making a large turnout of lint, and other products; and permit the use of a much smaller mote and dirt conveyor than formerly necessary.

The invention novel features, details of construction, combination of 'parts,,. and other objects of the invention will be hereinafter more particularly se-t'forth, illustrated in the accompanying one page draw-' ing and pointed out in the appended claims.

Reference is hereby made to the drawing a part of this application, of which, v

Figure 1 is a perspective view of'the adjustable mote board shield.

Figure 2 is aperspective view of the end of the mote board shield, in section.

Figure 3 is a perspectiveview of the saw draft door showing the blades practically closed. I

Figure 4 is a sectional view of the Murray type of air blast gin showing the adjustable mote board shield and the adjustable saw draft door mounted therein.

Like characters of reference designate like parts in all figures.

- The drawing shown in this instance shows the usual parts of an air blast cotton gin, particularly of the Murray type, such as air chamber 1, air duct 2, nozzle 3, duct to lint flue 4, saws 5, and moting point 6, saw

draft door 7 (removed when our device is partially opened and set at any pointjdesired and held in such position by fastenings 15, 16, 17 and 18. Inapplication the saw draft door of the air blast gin, particularly of the Murray type 7 is removed and our adjustable saw draft door is placed inside their door framing the top thereof placed up against the gin top the top of adjustable saw draft door 11 leaning forwardly and inwardly, after this is batted in the bottom falls down and the notch 12 in end of plates catch on the bottom. door sides. It will be observed this leaves it inside the gin leaning forward reducing the distance from the moting point tothe draft door, and the conve-Xly curved blades are pointing downward and with motes striking the blades so pointed, and the air admitted between said blades and directed towards the dirt and mote conveyor 8 tends to make thergeneralcirculation of air in said moting chamber from the moting point 6 to the dirt and mote conveyor 8, and in that direction only, as is shown by 21 and 22-, an to keep it away from the nozzle 3.

vThe adjustable mote board shield is a piece of hardwood susceptible of a smooth.

surfaced high polish, practically U-shaped,

and fitting on the mote board in the valley 26' of said U-shaped shield, and when placed on the device is inverted. The thinner lip 23, is nearest the saw teeth 5 at the nozzle 3 and the thicker lip 24 away from them. At each end of themote board shield is a. wedge'shaped piece ofmetal 27 holding said shield in place and having near the outer end of said wedge-shaped piece a curved slot 28 to adj ustably set the shield to change the position of the shield as desired at the nozzle 8.

It will be seen, or at least known to those familiar with the art to which my invention relates that in the use of the ordinary air blast gin, and particularly of the type of the Murray gin, that in use with the saw draft door closed the dirt and motes will be thrown from the moting point 6 against the door 7 with such force as to rebound to the nozzle 3 and be carried through lint flue 4, thereby injuring the finished product of the gin; also running with the door closed there will be a considerable portion of the lint and valuable products of the gin carried away out of the moting chamber into the dirt and mote conveyor, and thereby lost. If the saw draft door is left open a great deal of the dirt and motes will be carried out thereat, and with it a considerable portion of the lint and other products of the gin. It will also be seen, or known by those familiar with the art that in ginning in damp weather and in ginning a great many kinds of cotton, such as green, damp, wet, and that which has in it grasshoppers, spiders, spider-balls and other insects, the saw cutting these up throws on the mote board a gummy substance which freezes or sticks to the mote board, and keeps accumulating thereon with the addition of lint, streamers of cotton, and dirt, and causing streamers of cotton, lint and dirt to hang over the nozzle thereby practically preventing the running and usefulness of the gin, and making it necessary at frequent intervals to stop the machinery, clean out the gummed up and clogged portions and sandpaper oif the mote board. Under the present system a great deal of back lashing occurs. This isbrought about by portions of the lint failing to be properly discharged through the lint chamber and this eddying lint being caught by the teeth and carried around through the ribs the second time. As it passes through the ribs at the bottom it is dragged off and wedged in quantities and densely packed even through the huller ribs. Seedp'assing down the gin ribs cannot escape after being ginned and back up into the roll box. The slugs of lint and such like, are dragged from the bottom of the ribs to the top around the shoulder of the ribs and are wedged inin the same manner. When this condition exists fire is frequently caused at either bottom or top point of ribs by the friction; teeth may be broken off of saws at either point; saws warped or sprung-out of true; ribs worn by the saws being sprung out of shape and into them; and ribs broken'out' by this condition. Theme of the present de- Viceby removing the door and placing the adjustable saw draft door in place the dis tance from the moting point to the door is shortened, and tends to make the general contour of the inside of the chamber and the circulation of the draft from said moting point to the dirt and mote conveyor circular; theblades prevent the dirt motes and a part of the lint and products from being carried out the door into the air, and downwardly slanting position of the door and the convexly curved and downwardly slanting position of the blades prevent the dirt and motes from rebounding towards the moting point 6 and nozzle 3 and being drawn into the lint fine 4 at the nozzle 3. The air from what was formerly dead air space by reason of being drawn from the upper part of the saw at the moting point 6 to the dirt and mote conveyor by way of the adjustable saw draft door creates a current for carrying off the dirt and motes and heavier than lint and cotton products through the mote conveyor and allows the lint and cotton products to be drawn through the aperture near the nozzle 3 into the lint flue a. The effect of this also will be to permit of the use of a much smaller mote conveyor than at present used and decrease the amount of lint now carried off through the conveyor. This will in turn also assist in permitting a much greater portion of lint (which had been formerly circulating in the dead air space in the gin and carried out the mote conveyor) to'be carried out at the lint flue 4 for the reason that a greater current of air can now be applied at the nozzle 3 without disturbing the dirt and motes in their travel to the conveyor from the moting point 6. It will also be seen that this proper circulation of draft and the adjustable smooth highly polished hardwood mote board shield will relieve the condition of the gnmming up of the gin as described, and permit of the nearer closing of the aperture between the saw and the nozzle and thereby decrease the amount of dirt and motes getting into the lint flue at this place, and will prevent the forming of stringers and hangers and consequent back lashing therefrom.

I claim 1. In combination with an air blast cotton gin, an adjustable saw draft doorcomprising a plurality of convexed blades, a frame and means for adjustably holding same together, and means for attaching to said gin. 2. In combination with an air blast cotton gin, an adjustable saw draft door comprising a plurality of conveXed blades, a frame and means for adjustably holding same together, means for suitably attaching same to said gin, an adjustable mote board shield with a wedge shaped metallic piece at each end, a curved'slot in each piece near the outer edge, means for suitably attaching said shield and metal to the mote boardand gm.

3. In combination with an air blast cotton gin, and an adjustable saw draft door, as described, an adjustable mote board shield covering the length of the mote board, shaped like an inverted U, a Wedge shaped metallic piece at each end, a curved slot in each piece near its outer edge, means for suitably attaching said shield to the mote board, and said metal to the mote board and gm.

4. In combination with an air blast cotton gin, comprising an air chamber, air duct, nozzle, duct to lint flue, saws, ribs, moting chamber, dirt and mote chamber, an adjustable saw draft door comprising a plurality of convexed blades, a frame and means for adjustably holding same in place as desired, means for suitably attaching same to said gin, an adjustable mote board shield, a Wedge shaped metallic piece at each end thereof having a curved slot in each near its outer edge; means for suitably attaching said shield and metal to the mote board and in. VAN BUREN MADRY. 

